Your controller is expecting you to inject in $rootScope which you are not doing in your unit test.
You have:
createController = function() {
return $controller('SourceController', {
'$scope': $scope,
'$routeParams': $routeParams,
'fileService': fileService
});
But but should have:
createController = function() {
return $controller('SourceController', {
'$scope': $scope,
'$rootScope': $rootScope,
'$routeParams': $routeParams,
'fileService': fileService
});
Also, you will want to call this code:
createController();
$scope.init();
before you resolve your promise:
deferred.resolve(multipleFiles);